#183A83#183A83

#183A83 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.1% C 0.129 H 262.9°. Best body text is #FFFFFF at 10.65:1 contrast (WCAG AA passes).

Color values

HEX#183A83
RGBrgb(24, 58, 131)
HSLhsl(221, 69%, 30%)
HSVhsv(221, 82%, 51%)
CMYKcmyk(81.7%, 55.7%, 0%, 48.6%)
CIE-LABlab(26.33, 16.48, -44.54)
CIE-LCHlch(26.33, 47.49, 290.30°)
OKLaboklab(37.07% -0.016 -0.1284)
OKLCHoklch(37.07% 0.129 262.9)
XYZxyz(5.9850, 4.8583, 22.0906)
Luminance0.0486 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#183A83 #836118
analogous
#186F83 #183A83 #2C1883
triadic
#183A83 #83183A #3A8318
tetradic
#183A83 #83186F #836118 #18832C
square
#183A83 #83186F #836118 #18832C
split-complementary
#183A83 #832C18 #6F8318
monochromatic
#050C1C #0F234F #183A83 #2151B7 #3A6DDB

Accessibility & contrast

On white

10.65
#183A83 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.97
#183A83 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A83
10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##183A83#FFFFFF#000000##FFFFFF
##183A831.0010.651.9710.65
#FFFFFF10.651.0021.001.00
#0000001.9721.001.0021.00
##FFFFFF10.651.0021.001.00

Color blindness preview

Protanopia (red-blind)
#004386
Deuteranopia (green-blind)
#003A82
Tritanopia (blue-blind)
#004C58
Achromatopsia (no color)
#3E3E3E

Design tokens & code

CSS
--color: #183a83;
/* rgb */ color: rgb(24, 58, 131);
/* oklch */ color: oklch(37.1% 0.129 262.9);
Tailwind
colors: {
  custom: {
    50: '#686fa8',
    500: '#183a83',
    950: '#000000',
  },
}
SCSS
$custom: #183a83;
$custom-light: #686fa8;
$custom-dark: #000000;
JSON
{
  "hex": "#183a83",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 131
  },
  "hsl": {
    "h": 220.935,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37066,
    "c": 0.12944,
    "h": 262.9
  },
  "luminance": 0.04859
}

Semantic roles & 50–950 ramp

primary
#183A83
secondary
#B79140
accent
#B43CEC
background
#F6F6FA
surface
#ECECF4
border
#C7C7CE
text
#070710
muted
#7A7A7F

Preview Lab

Preview with #183A83

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →

#183A83 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva